Telex operating instructions Equipment SET-UP, BTR-300 SET-UP

EQUIPMENT SET-UP

BTR-300 SET-UP

UNPACKING

Unpack your BTR-300 and TR-300 System. If there are any damages or shortages, refer to the “Warranty Service Information” section in this manual.

INTERNAL INTERCOM SWITCHES

The BTR-300 has internal switches that allow it to accommodate intercom systems other than what it was set to interface with when manufactured. Product No. 71276XXXX is set for Telex Audio Com and similar systems. Product No. 71280XXXX is set for RTS 2 wire and similar systems. Units originally set for Telex may be set to RTS and vice versa. Both models may be set to interface with Clearcom, and 4 wire RTS/McCurdy matrix type systems. The following paragraphs ex- plain how to change the switches if necessary.

Remove Cover: Remove the cover screws (13) and lift off the cover.

DIP Switch: See Figure 8 and Table 1. Set the DIP switch as shown in the table.

High/Low Switch: See Figure 8 and Table 2. Set the high/low switch as shown in the table.

Intercom Switch: See Figure 8 and Table 2. Set the switch to 2 wire for all 2 wire systems. Set the switch to 4 wire if the BTR is to be con- nected to a balanced 4 wire intercom system through the Auxiliary input and output jacks.

Note: Do not connect both 4 wire and 2 wire sys- tems at the same time. Loud feedback may result.

Replace Cover: Carefully align the cover and replace the screws.

INTERCOM JACK WIRING

CONFIGURATIONS

See Table 3 for the wiring of the intercom and auxiliary jacks.

DIP SWITCH POSITION

		1	2	3		4	5	6	7	8	9
Telex Audiocom		ON	ON	OFF		ON	OFF	ON	OFF	OFF	ON
RTS 2 wire		OFF	OFF	ON		OFF	ON	OFF	ON	ON	OFF
Clearcom		ON	OFF	ON		ON	OFF	OFF	OFF	ON	ON
4 Wire		N/A	N/A	N/A		N/A	N/A	N/A	N/A	N/A	N/A
				Table 1
		INTERCOM		LOW/HIGH				INTERCOM
		TYPE		SWITCH				SWITCH
	Telex
	Audio Com				Low			2 wire
	RTS				High			2 wire
	Clearcom				Low			2 wire
	4 wire				N/A			4 wire

Table 2

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